Elevator abnormity diagnostic system

The invention relates to an abnormality diagnosing system for an elevator. The elevator (10) side is provided with a primary diagnosing device (20), and a monitoring center (31) side is provided with a secondary diagnosing device (30). At the primary diagnosing device (20), the abnormality diagnosing system collects data of each device and detects abnormal signs, and then sends the data of each device to the monitoring center (31) periodically, and reports the condition to the device detected with the abnormal signs to send the data. At the secondary diagnosing device (30), the abnormality diagnosing system stores the data of each device in a database (34), and predicts the failure period of the device according to the record of the data. If a device close to the failure period is existent, a service man attends the scene, till to the condition that failure does not occur at next maintenance and detection, the service man does not attend the scene to carry out corresponding treatment,so as to reduce the atten